Automatic shut-off.



No. :$8,279. PATENTBD JUNE 25, 1907.

. J. G. HALL.

AUTOMATIC SHUT-OPF.

APYLIoATIon FILED In 21. 190e.

' Jw'azz,

WHA/55555 [NVE/vraie. M By A TTORNE Ys invention consists of certain'novel features' UNITED srlrrEsA PATENT OFFICE.

I JACOB G. HALL, OF BUCKHANNON, WEST VIRGINIA.

I AUTOMATIC SHUT-oFF.-

Specification of Letters Patent.

i Patented June 25, 1907.

Application iled May 21,1906. SeriafNo. 317,996.

zen of the United States, residing at Buck-- hannon, in the county of Upshur and State of West Virginia, have invented a new and useful Automatic Shut-Gif, of which the following is a specification.

his invention relates toA automaticcut oifs for gas burners, and its object is trprovide means for automatically cutting o -the ow of gas be extinguished.

Another object is to provid a heater hava ilot light which not only serves to ignite t e gas escaping from the burner of the heater but also to maintain the flow of gas to the burner, said flow being adapted to be cut off automatically in the eventv of the extin ishing of the pilot ll ht.

With these and other o jects in view, the

of construction and combinations of parts which will be hereinafter more fully described and pointedy out in the claims. 4

In the .accompanyin drawings is shown the preferred form of t e inventlon.

In said drawings :'-Figure 1-is a section through vthe burner constituting the present l mgaseat 14t invention; and Fig. 2 is an enlarged sectional view of a modification. Y v

Referring to the figures by characters of reference, 1 is a gas su ply pi e havin a branch 2 provided witli) a va ve 3 an a burner 4 to form a pilot li ht. The outlet end of the burner is tapere as shown at 5 to .constitute a seat for a slide valve 6 `ar ranged at the lower end of a rod 7 ada ted to extend through the center of the flame and constituting a thermostat. This rod is connected to a lever 8 fulcrumed at one end, as shown at 9, and adjustablysupported by a screw 10 mounted in a bracket 11 and swiveled or otherwise connected to the lever as shown at 12.

The pipe 1 opens into a valve casing 13 haverein adapted to be contacted by a valve 15 disposed at the lower end of a rod 16. This rod lies close to the burner 4 and is connected to the lever 8. This rod is made of a material which will quickly expand when heated. An outlet pipe 17 eX- tends from the casing 13 and has a burner 18 thereon which is so located that gas esif for any reason the'flame should "has a va yve 41 `therein w riflcing the a tioned that both of them will hold the valves 6 and 15 normally upon their seats althou h both of the valves can be moved from t e seats b tur th screw 10 and swin the levier Smdbgwnvgard. This will 'pellni gas to escape through the burners 'and by lgniting it at the burner 4 the two thermostats will be ex anded and lever 8 can then be returned to its original position without causin the valveto close. The pilot light will, oig course, ignite the gas the burner 18, and if for any reason the pilot light should be extinguished, the thermostats will simultaneously contract and close the valves.

In Fig. 2 has been shownfa construction wherein a single thermostat may be emloyed in connection with a burner and pilot ght.- With this stat 32 extends into casing 33'having aseat 34, and a valve 35 is connected to the end of the thermostat and` is ada ted to contact With the seat. The pilot li seat 37 adapted to be close the thermostat. small opening therein through which a'small amount of gas is free to pass. The pipe 40 extendin from lthe cas' 33 to the burner 'ch will not open unless subjected to m'ore pressure than that exerted by the flow of gas tothe ilot li ht. By heating the thermostat both o the va ves lwill be opened and the pilot light will maintain -the `thermostat extended. The iiow of gas, however, will be insuiiicient to open the valve 41 unless the valve 39 is opened, whereupon the full pressure of directed a ainst the valve and open it so that the gas esca e from the bottom.

by a valve 38 on The preferre 4form of the invention has been set forth in the fore oing description, but I do not limit myself: thereto as I am aware that modifications may be made therein without de vantages thereof, and I therefore reserve the right to make such changes as fairly fall'withi'n thescope of the claims.

What is claimed is:

y1. The combination with a burner and a pilot burner adjacent thereto; of a normally closed valve for controlling the liow of gas to the burner, a normally closed valve for controlling the flow of as to the pilot burner, and a thermostat aapted to be heated by the pilot light to open t e valves.

construction. the thermo- The shut oif valve 39 has a the gas will be artingfrom the spirit or sac-i escaping from Y t 36 has a'valve v IOO IIO

2. The combination with a main .burner and a ilot burner adjacent thereto; of a norma y closed valve for controlling the loW of gas to the main burner, a thermostat extending from the valve and adapted to be heated by the pilot light to open the valve, a lever constitutin a su port for the thermostat, and means or adJusting the lever upon its fulcrum. y

3. The combination With a main burner and a pilot burner adjacent thereto; of valves for controlling the supply of fuel to 85eme the mein burner and pilot burner, a lever, means for swinging the lever` upon its fulerum, and thermostats connecting the valves with the lever, said thermostats being adapted to be heated by the pilot light.

In testimony that I claim the foregoing as my own, l have hereto aixed my signature in the presence of two Witnesses.

JACOB G. HALL.

Witnesses:

R. T. CROWLEY, WM. T. OBRIEN. 

